volume_task.c

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/*C**************************************************************************
* NAME:         volume_task.c
*----------------------------------------------------------------------------
* Copyright (c) 2006 Atmel.
*----------------------------------------------------------------------------
* RELEASE:      C51 Sample      
* REVISION:     1.00     
*----------------------------------------------------------------------------
*
*****************************************************************************/

/*_____ N O T E _____________________________________________________________
	
___________________________________________________________________________*/


/*_____ I N C L U D E S ____________________________________________________*/

#include "system\reg51.h"
#include "system\compiler.h"
#include "system\config.h"
#include "driver\io_def.h"
#include "volume_task.h"                      
#include "driver\i2c_drv.h"
/*_____ M A C R O S ________________________________________________________*/


/*_____ D E F I N I T I O N ________________________________________________*/



/*F**************************************************************************
* NAME: disp_task_init
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE: 
*   Display task initialization
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void vol_task_init (void)
{
	EA = Low;
	I2c_WriteByte (SC7313_ADD, RADIO_IN); /* reset selection CD input */
	//I2c_WriteByte (SC7313_ADD, 0x5c); /* reset selection CD input */
	I2c_WriteByte (SC7313_ADD, 0x80);
	I2c_WriteByte (SC7313_ADD, 0xa0);
	I2c_WriteByte (SC7313_ADD, 0x7f);
	I2c_WriteByte (SC7313_ADD, 0x6f);
	I2c_WriteByte (SC7313_ADD, VOL_Step_Map[vol_value]);
	//x7313_write(RADIO_IN);
	//x7313_write(0x80);
	//x7313_write(0xa0);
	//x7313_write(0x7f);
	//x7313_write(0x6f);
	//x7313_write(VOL_Step_Map[vol_value]);
	EA = High;
}

Byte code VOL_Step_Map[]={
	0x3f,	//0 (MUTE dB)
	0x3f,	//1 (-78.75dB)
	0x3e,	//2 (-75dB)
	0x39,	//3 (-70dB)-5
	0x34,	//4 (-65dB)-3.25
	0x31,	//5 (-61.75dB)-3.25
	0x2e,	//6 (-57.5dB)-3.25
	0x2b,	//7 (-53.25dB)-3.25
	0x28,	//8 (-50dB)-3.25
	0x26,	//9 (-47.5dB)
	0x24,	//10 (-45dB)
	0x22,	//11 (-42.5dB)
	0x20,	//12 (-40dB)
	0x1f,	//13 (-38.75dB)
	0x1e,	//14 (-37.5dB)
	0x1d,	//15 (-36.25dB)
	0x1c,	//16 (-35dB)
	0x1b,	//17 (-33.75dB)
	0x1a,	//18 (-32.5dB)
	0x19,	//19 (-31.25dB)
	0x18,	//20 (-30dB)
	0x16,	//21 (-27.5dB)
	0x14,	//22 (-25dB)
	0x12,	//23 (-22.5dB)
	0x10,	//24 (-20dB)
	0x0e,	//25 (-17.5dB)
	0x0c,	//26 (-15dB)
	0x0a,	//27 (-12.5dB)
	0x08,	//28 (-10dB)
	0x06,	//29 (-7.5dB)
	0x04,	//30 (-5dB)
	0x02,	//31 (-2.5dB)
	0x00,	//32 (0dB MAX)
};

/*Byte code VOL_Step_Map[]={
	0x3f,	//0 (MUTE dB)
	0x3e,	//1 (-77.5dB)
	0x3c,	//2 (-75dB)
	0x3a,	//3 (-72.5dB)
	0x38,	//4 (-70dB)
	0x36,	//5 (-67.5dB)
	0x34,	//6 (-65dB)
	0x32,	//7 (-62.5dB)
	0x30,	//8 (-60dB)
	0x2e,	//9 (-57.5dB)
	0x2c,	//10 (-55dB)
	0x2a,	//11 (-52.5dB)
	0x28,	//12 (-50dB)
	0x26,	//13 (-47.5dB)
	0x24,	//14 (-45dB)
	0x22,	//15 (-42.5dB)
	0x20,	//16 (-40dB)
	0x1e,	//17 (-37.5dB)
	0x1c,	//18 (-35dB)
	0x1a,	//19 (-32.5dB)
	0x18,	//20 (-30dB)
	0x16,	//21 (-27.5dB)
	0x14,	//22 (-25dB)
	0x12,	//23 (-22.5dB)
	0x10,	//24 (-20dB)
	0x0e,	//25 (-17.5dB)
	0x0c,	//26 (-15dB)
	0x0a,	//27 (-12.5dB)
	0x08,	//28 (-10dB)
	0x06,	//29 (-7.5dB)
	0x04,	//30 (-5dB)
	0x02,	//31 (-2.5dB)
	0x00,	//32 (0dB MAX)
};*/